Patents by Inventor Choi K. Chak

Choi K. Chak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Suction syringe with an automatic locking means
    Patent number: 4758232
    Abstract: A suction syringe for facilitating blood withdrawing operation by use of a vacuum produced and retained therein in advance is disclosed.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: July 19, 1988
    Inventor: Choi K. Chak